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Three oxygen sensors, one question: can site differences flag the sickest breathless patients?

NCT ID NCT07824414

Diagnosis Sponsor: Yonsei University Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Sep 17, 2026 · Last updated Sep 18, 2026 · Updated 1 time

Summary

Emergency doctors often rely on a single finger oxygen reading, but blood flow and other factors can make that number misleading. This study measures oxygen levels at the finger, earlobe and forehead at the same time in adults who arrive at the emergency department with shortness of breath. Researchers will track whether larger gaps between those readings are linked to death or admission to intensive care, and compare the approach with existing early warning scores.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
multi-site pulse oximetry, measuring oxygen levels at the finger, earlobe and forehead
What this could lead to
If the differences between readings track with outcomes, emergency teams could use a quick, non-invasive check to spot which breathless patients need intensive care sooner.
What could go wrong
This is an observational study, so it can show a link but not prove that acting on the readings changes care. Results may not hold in other hospitals or patient groups.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 400 people

The number the study aims to enrol. It can still change while the study runs.

Started

May 2026

Expected to finish

Apr 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

We will enroll patients who meet the enrollment criteria who visit an emergency department of a tertiary teaching hospital located in Seoul, South Korea.

Ages

19 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Adult patients aged 19 years or older presenting to the emergency department with dyspnea, classified as KTAS level 1-3 Exclusion Criteria: * Patients in whom SpO₂ measurements were not obtained simultaneously * Patients in whom arterial blood gas analysis was not ordered at initial evaluation * Pregnant patients * Patients with facial trauma or hand trauma * Patients with amputation, injury, or burns at the measurement sites * Patients wearing nail polish * Patients with dyshemoglobinemia * Non-Korean nationality * Patients who did not provide consent to participate in the study

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Conditions

The condition(s) this trial relates to.

Dyspnea

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Dyspnea

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Yonsei University Severance Hospital

    RECRUITING

    Seoul, Seoul, 03722, South Korea

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